This is a note to let you know that I've just added the patch titled

hwmon: (k10temp) Only apply temperature offset if result is positive

to the 4.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: hwmon-k10temp-only-apply-temperature-offset-if-result-is-positive.patch and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From aef17ca1271948ee57cc39b2493d31110cc42625 Mon Sep 17 00:00:00 2001

From: Guenter Roeck linux@roeck-us.net Date: Wed, 7 Feb 2018 17:49:39 -0800 Subject: hwmon: (k10temp) Only apply temperature offset if result is positive MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

From: Guenter Roeck linux@roeck-us.net

commit aef17ca1271948ee57cc39b2493d31110cc42625 upstream.

A user reports a really bad temperature on Ryzen 1950X.

k10temp-pci-00cb Adapter: PCI adapter temp1: +4294948.3°C (high = +70.0°C)

This will happen if the temperature reported by the chip is lower than the offset temperature. This has been seen in the field if "Sense MI Skew" and/or "Sense MI Offset" BIOS parameters were set to unexpected values. Let's report a temperature of 0 degrees C in that case.

Fixes: 1b50b776355f ("hwmon: (k10temp) Add support for temperature offsets") Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/hwmon/k10temp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/hwmon/k10temp.c +++ b/drivers/hwmon/k10temp.c @@ -128,7 +128,10 @@ static ssize_t temp1_input_show(struct d

data->read_tempreg(data->pdev, &regval); temp = (regval >> 21) * 125; - temp -= data->temp_offset; + if (temp > data->temp_offset) + temp -= data->temp_offset; + else + temp = 0;

return sprintf(buf, "%u\n", temp); }

Patches currently in stable-queue which might be from linux@roeck-us.net are

queue-4.15/hwmon-k10temp-add-temperature-offset-for-ryzen-1900x.patch queue-4.15/hwmon-k10temp-only-apply-temperature-offset-if-result-is-positive.patch queue-4.15/acpi-watchdog-fix-off-by-one-error-at-resource-assignment.patch